Reciprocatory compressor



Nov. 13 1951 A. o. CARPENTER RECIPROCATORY COMPRESSOR 2 SHEETS-SHEET l I Filed Dec. 28, 1946 RM Y a w T. ml w H W mm w zlmu 4 L 0 n 3 .m .Y N

Nov. 1-3, 1951 A. o. CARPENTER RECIPROCATORY COMPRESSOR 2 SHEETSSHEET 2 Filed Dec. 28, 1946 at w on Te N N M R E 0 v0 T ma m n a s L m Patented Nov. 13, 1951 RECIPROCATORY COMPRESSOR Allan 0. Carpenter, Corning, N. Y., assignor to Ingersoll-Rand Company, New York, N. Y., a corporation of New Jersey Application December 28, 1946, Serial No. 719,022

Claims.

This invention relates to compressors, and more particularly to reciprocatory compressors of the multi-stage type.

One object of the invention is to construct a compact compressor of the multi-stage type requiring only a small area of floor space.

A further object is to rend-er the compressor highly efficient and simplify its construction.

Another object is to provide within the compressor casing the essential channels required for the passage of fluid medium to and from the compressor cylinders.

A more specific object is to connect the inlet and discharge conduits to the main frame of the compressor and thereby obviate the need of disturbing these connections whenever it becomes necessary to service the important hearing surfaces of the movable parts of the compressor.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawings accompanying this specification and in which similar reference numerals refer to similar parts,

. Figure l is a longitudinal side elevation of a compressor constructed in accordance with the practice of the invention,

Figure. 2 is a plan view of the compressor, part- 1y broken away,

Figure 3 is a perspective view of a detail,

Figure 4 is a longitudinal elevation, partly in section, of the compressor, and

Figure 5 is a transverse view taken through a Figure 4 on the line 5---5.

Referring more particularly to the drawings, the compressor, designated in general by 20, comprises a frame 2| of box-like form having a seat 22 on and adjacent one end of it uppermost surface to support a vertical initial stage cylinder 23 and having a seat 24 on the side surface remote from the cylinder 23 to support a horizontal second stage cylinder 25.

The cylinders 23 and 25 are each provided with a face which abuts the seats 22 and 24 and the cylinders are secured to the frame 2| by bolts 26' packing device 3-8 in said head. The rod also slides through a second packing device 39 in a wall 45 spaced from the packing device 38, and in the side of the frame 2| is an opening 4| to admit of access to the packing devices 38 and 39.

The piston 30 is connected in a like manner to the crank 35, its rod 42 being attached to a crosshead 43 slidable upon guides 34, and a connecting rod 45 pivotally connected to the crosshead 43 and the crank 33 transmits movement from the shaft 31 to the piston. Packing devices 45 and 41 are arranged, respectively, at the innermost end of the cylinder 25 and in a wall 48 of the frame 2! suitably spaced with respect to the packing device 45 to prevent leakage of fluid medium along the rod 42 and are accessible through an opening 49 in the side of the frame.

The pistons are double acting. The fluid medium intended to be compressed in the ends of the piston chambers 21 and 28 passes thereinto through inlet valve mechanisms 59 and. is discharged through valve mechanisms 5!. Such fluid medium is conveyed to the compressor by a conduit 52 that is secured to the frame 2! by bolts 53 and opens into a passage 54 extending through the upper part of the frame'2l at a point within the boundary of the seat 22 and through the wall of the cylinder 23 at a point within the face abutting the seat 22 to convey fluid medium to the inlet valve mechanisms 58 at both ends of the cylinder. The compressed fluid discharged through the valves 5| from the piston chamber 21 is conveyed therefrom to the piston chamber 28 by a passage 55 in the walls of the cylinders 23 and 25 and in the upper portion of the frame 2! lying within the angle defined by the longitudinal axes of the cylinders. The passage 55, similarly to the passage 54, lies within the boundary of the joint between the cylinder 20 and the frame at the point where it passes through the frame into the cylinder 20. The compressed fluid discharged from the piston chamber 28, through its discharge valves 5|, passes through a discharge passage 56, formed within the wall of the cylinder 25 and extending through the cylinder wall and frame at a point within the joint therebetween and into the lower portion of the frame 2|, to a port 5! that opens into a discharge conduit 58 connected to the side of the frame 2! by bolts 59.

As will be readily apparent from the foregoing description, the fluid medium delivered to the compressor passes through channels located only within the casing parts of the compressor and, owing to this arrangement, the need of conduits 3 exteriorly of the compressor, other than the inlet and discharge conduits 52 and 58, is thus entirely eliminated. The conduits 52 and 58 are connected only to the frame 2|, and this arrangement has the advantage that the cylinders may be conveniently removed and replaced for purposes of inspection and'repairs without disturbing the seals between the inlet and discharge conduits and the frame or, as in many instances, the seals at the joints along the lengths of said conduits.

In order to further avoid the need of protuberances and the arrangement of auxiliary devices on the exterior of the compressor a portion 50 of the part of the passage 55 lying within the frame 2! is utilized as a receptacle for an inter-' cooler 6| serving to reduce the temperature of the compressed fluid discharged; from the piston chamber 21. This portion 6!] lies in parallelism with the axis of the cylinder 25 and at a sufficiently higher elevation than said cylinder to permit of the-insertion of the intercooler GI into and its removal from theportion 60 without interference by the cylinder 25 or any of the parts that may be attached thereto. The intercooler 6!, as shown, is of less length than the portion 60 so as to require the compressed fluid to come into contact with the entire length of the intercooler inpassing through the portion 60.

The intercooler, which may be of any suitable type, extends longitudinally of the portion 60 of the passage and has the usual baffles 62 for deflecting the compressed fluid into repeated and intimate contact with the cold surfaces of the intercooler. A

Means are provided for preventing the condensate produced by the cooling of the compressed fluid from being carried into the piston chamber 28. The frame 2!, accordingly, has a horizontal baifie 63 that extends transversely into the path of the fluid flowing through the passage 55. The baffle 63' is located below the intercooler GI, and the condensate projected thereagainst is deflected out of the fluid stream whence it passes downwardly into a well 64 at one side of the crosshead guide 44 and opening into the side of the frame 2|. The open'side of the well is covered by a condensate removal device 65 of any well known type, as for example one employing a float actuated valve for communicating the well 64 with a drain pipe 66 whenever the condensate in thewell 64 reaches a predetermined high level.

On one side of the frame 2| is a seating surface 61 for a panel 68' upon which are arranged the pressure and load indicating gages and the switches which control the motor -69 driving the compressor and-which gages and switches are collectively designated: 10. The panel 68 seats flush against the surface fi'l, and in the portion of the frame covered by thepanel is a recess '11 for the accommodation of such portions of the gages and switches 1-0 asmay" lie on the reverse side of the panel and for the electrical conduits 12 and the fluid conduits- 13- leading to the instruments on the panel. Aton'e end of therecess H is a passage 14' that extends transversely through the frame to theopposite side thereof to receive thecon'duits 1 2 and t3 which are preferably of such length as to project slightly beyond the end" of the passage 14 for connection with suitable conduit extensions '(not' shown).

By thus seating the'pane1 68 flush against the side of and: extending the conduits 12' and: 13

through the frame 2! the needof brackets or the like for supporting the panel will be eliminated and the conduits will be well protected against damage and of greatly reduced length as compared with arrangements wherein these conduits are trained along the exterior of the compressor.

I claim:

1. In a multi-stage compressor, the combination of a frame having a pair of' seats, first and second stage cylinders mounted on said seats and exteriorly of the frame, an inlet passage in the frame and the first stage cylinder for said first stage cylinder, said passage passing through the frame at a point within the boundary of one of said seatsya channel wholly in the frame and the cylinders and passing through the frame at points lying within the boundaries of said seats for conveyingcompressed fluid from the first stage to the second stage cylinder, a discharge passage in the second stage cylinder and the frame for said second stage cylinder, conduits for the inlet passage and the discharge passage, and means for securing the conduits to the frame.

2, In a multi-stage compressor, the combination of a frame; first and second stage cylinders mounted exteriorly of and on the frame, an inlet passage in the frame and the first stage cylinder for the said first stage cylinder, a channel wholly in the frame and the cylinders for conveying compressed fluid from the first stage to the second stage cylinder, an intercooler mounted within the channel for reducing the temperature of the compressed fluid flowing therethrough, a discharge passage wholly in the second stage cylinder and the frame for said second stage cylinder, conduits for the inlet and discharge passages, and means for securing the conduits to the frame.

3. In a multi-stage compressor, the combination of a frame having a pair of seats thereon, a vertical cylinder having a face mounted on one of said seats on the frame, an inlet passage in the frame and the cylinder lying within said face for conveying fluid medium to the cylinder, a horizontal cylinder having a'f'ace mounted on the other of said seats on the side of the frame, a channel wholly in the cylinders and the frame and lying within said faces for conveying compressed fluid from the vertical cylinder to the horizontal cylinder and the portion of the channel lying in the frame being located within the angle defined by the longitudinal planes of the cylinders, an intercooler in'the' portion of the channel lying within the frame for cooling the compressed fluid flowing to the horizontal cylinder, a discharge passage in the horizontal cylinder and the frame, conduits for the inlet and discharge passages, and means for securing the conduits to the frame.-

4. In a multi-stage compressor, the combination of a frame, first and secondstage cylinders on theframe, an inlet passage in the frame and the first stage cylinder for said first stage cylmeans for securing the conduits to the frame.

5. In a multi-stage compressor, the combination of a frame, first and second stage cylinders on the frame, an inlet passage in the frame and the first stage cylinder for said first stage cylinder, a channel wholly in the frame and the cylinders for conveying compressed fluid from the first stage to the second stage cylinder, an intercooler in the channel, a deflector in the channel for deflecting condensate from the compressed fluid flowin from the intercooler to the second stage cylinder, a well in the frame to receive such condensate, means for controlling the flow of condensate from the well, a discharge passage in the second stage cylinder and the frame, 15 1,707,307

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 10 Number Name Date 688,520 Hill Dec. 10, 1901 792,790 Prellivitz June 20, 1905 1,008,519 Barr Nov. 14, 1911 1,435,135 Clapp Nov. 7, 1922 Holdsworth Apr. 2, 1929 2,236,853 Herzmark Apr. 1, 1941 

